Chain case and gearing.



P. H. BREED.

CHAIN CASE AND GEAEING.

urmouxon mum JULY 11. 1910.

Patented De0. 27,1910.

UNITED STATES PATEN OFFICE.

PRESTON H. BREED, CF PITTSFIELD, MASSACHUSETTS, ASSIGNOR T0 ALDEN SAMPSON MANUFACTURING COMPANY, OF PITTSIEIELD, MASSACHUSETTS.

CHAIN CASE AND GEARING.

Specification of Letters Patent.

Patented Dec. 27, 1910.

Original application filed September 1, 1909, Serial N 0. 515,650. cDivided and this application filed July 11,

.is a specification, reference being had therein to the accompanying drawing.

This invention relates to nnprovements 1n chain cases and gearings and is a division of my co-pending application, Serial No. 515,650, filed September 1st 1909.

The object of my present invention is to provide a chain case which incloses the chain with a longitudinally extending wall or shelf Within the case, adapted to pick up the ends of the chain if broken, as it rolls over the sprocket and in this way prevent it from wedging under the sprocket and probably injuring the chain case; itself; one of the sprockets, or probably some other mechanism connected with the sprocket by reason of the wedging of the broken chain.

In the accompanying drawing-Figure 1 is a longitudinal sectional view of a .chain case with my improvement applied thereto. Fig. 2 is a transverse sectional view on the line 2-2, of Fig. 1.

Referring now to the drawings,'1 and 2 indicate sprocket wheels, either of which may be the driving sprocket so far as my present improvement is concerned, but in this instance, the sprocket 2 is the driving sprocket and the sprocket 1 is the driven sprocket. Passing around these sprocket wheels is a chain 3 of the usual construction. Surrounding the sprocket wheels and inclosing them and the chain is a chain case A having side walls 4 and top and bottom walls 5.

My present improvement comprises a shelf or wall 6, which is located between the side walls 4 of the case, and preferably filling this space as shown in Fig. 2. This wall or shelf 6, is located between the sprocket wheels and also between the upper and lower paths of the chain with its ends 7 turned up ward and located adjacent the sprocket wheels. With this improvement when the chain is broken, its broken end will fall upon this shelf or wall 6 as it rolls over the sprocket, and it and the complete chain will be caught by the shelf and prevented from being wedged between either of the sprockets and the wall of the chain case.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. Thecombination with a driving sprocket and a driven sprocket apart from the driving sprocket and adapted to receive a sprocket chain, of a case extending from one sprocket to the other and having an interior chain receiving member located in the case adjacent the sprockets for the purpose described.

2. The combination with a driving chain, a driving and a driven sprocket adapted to receive said driving chain, of a chain case having an interior dimension greater than the res ective diameters of the said sprockets, an a longitudinally extending shelf located within the case and between lines drawn from the peripheries of the sprockets, the ends of the shelf turned upward and extending adjacent the sprockets.

3. The combination with a driving sprocket and a driven sprocket apart from the driving sprocket, a chain passing around the sprockets, a chain case extending between the sprockets, the case having side walls and an interior dimension greater than the respective diameters of the sprocket wheels, and a longitudinally extending shelf projecting from the side walls of the case and located between lines drawn from the peripheries of the sprockets for the purpose described.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

PRESTON H. BREED.

Witnesses BESSIE F. PARKER, 

